linux-kernel - Re: [PATCH] devpts: Fix NULL pointer dereference in dcache

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Message-ID: <CAHk-=whZUbznC+sdnFz6B5F7E7+ywZgx025u0kEnFk3S_7gFQA@mail.gmail.com>
Date:   Fri, 4 Oct 2019 09:54:44 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Christian Brauner <christian.brauner@...ntu.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Will Deacon <will@...nel.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Amir Goldstein <amir73il@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Varad Gautam <vrd@...zon.de>, stable <stable@...r.kernel.org>,
        Jan Glauber <jglauber@...vell.com>
Subject: Re: [PATCH] devpts: Fix NULL pointer dereference in dcache_readdir()

On Fri, Oct 4, 2019 at 9:52 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Dang, I thought this already got merged. But we only discussed it
> extensively and I guess it got delayed by all the discussions about
> possible fixes for the d_lock contention.

Side note: I'm not all _that_ worried about the d_lock contention
thing, simply because the regression report was from an artificial
benchmark, and it was on a 144-core machine.

Compared to the Oops, it's not really a thing.

            Linus